Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '136eb04080a2d83de24cef65ccbee6c2a69c181fc7b81cc57c2cf69f50273d87' 
  AND token = 'vtikSQTU8GCNbLPRrVYKR4aIETId9GctCecvw1P1R/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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