Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe9f6150e416b739ac6c05818f6292c929bf773b75fec0e89d3b0b4c74dc4c5a' 
  AND token = '8bDa6h4T1Mg7dRAZ8FDogAJCaQdTySajC/fr/jtSEGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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