Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5714211e72adc75c5f5b8d99586a18cbba6e478e08bd4141df90e0c556047404' 
  AND token = 'SLH4WeAvvTk75AZZS3bD+HshJvndROQtkz4asclTdXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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