Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4648500aaa7e6b042aa0d289f09c905bd0801245c6d6e31bdd85af51e200b84' 
  AND token = 'raNaq2oljmBj1KAk64XQrRbyiUnCPNIQ8BevY7NPqpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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