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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e8ac63b601ac1bd424e5490b2cab0bcb35d1bc671c3441b1a8bbad0dde3b9565' 
  AND token = 'o3p07qzbcV6d26dNnUeYrnPStAi4G1hHSwedeK+AQto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}