Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48474a1d4c4ea47b712624d35122dfb2e27a44202e2e6c845f3ffe9c06d8f2fe' 
  AND token = '9znkd7XJWgcDVR/em/xGDVUanVutUtq8olX03a1zYTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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