Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34d03110133e5c25f5dd7bd397bba8b3b892f91b128f387e0b6ff497dba55981' 
  AND token = '+3bJBlRy6dnatJ7Mm5s+hk6ezQRgJQNz5T9vpGpC6VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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