Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59ebed3ab28e6e6bcfe1db7243b1fc0c988884b27aeaa7aa6a1eb1041e41dd91' 
  AND token = 'tU721oefgbgE83FXOUu155NHxg54AhB5JAJXtnO75yQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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