Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86ad47544ae6cf2633b378a0920c2aac9f2c1a799f31bedb21b20c484c40cc19' 
  AND token = 'xUju5imhnjwIRmqVTHTen6Co69auWMAwNocizuzCQOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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