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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '32a211b6f6cf8dcce98569b86937074b7b14aac8a387d2fcf4e478fef1d0be53' 
  AND token = '8GLLlXRgfaxd5lRR0XhIsCF9Avo6VJuuFCE8SVCar4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}