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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd4761f8c064595d67db1a4482fd99fa42586a3d403e1faf3c34ac73430760867' 
  AND token = 'uY6sh3eUpRvIjUadnCM1h8ZhCagoKWuo+2OkatZFiKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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