Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2567d4ff106e02dde116b5b71aebded97f678d6a7badb1ad1f3a025041789b78' 
  AND token = 'cnOztHDYBVbOZZ9FSRAeoeI+k5AS97g52EA8o5v3tVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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