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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd1ff59c2c512e2b63bec93e5c63660440d9839fc7cffb4e6da60e26156feb98d' 
  AND token = 'uzSlaNJ1yx6gps4VtGcCYZQkysCPTict3YiNLE1Gf/w=' 
  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"
    }
  }
}