Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '026df3f519eec0f0e25bccc38af107cbec25d227482ae4e0d4c4cae15f2370f6' 
  AND token = '5xPsMUwXA6B6bWPEUhFv6FikWHQ5y0eQ/kAXNkp6140=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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