Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88f22aa26d950ae3a9f729b100d0acfe281a22d0bb51163e89a90a5ad6c8fe60' 
  AND token = 'LlKmCPcjxB9isAnINvxxDcqQqInRN2ai333K9aEtRcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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