Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bda0b4d0667d3815e3e1ffa1ed831250eb445da69185aabf158e783042e243bb' 
  AND token = 'VJTzx34gmsWZY5eVw99GFkomJmsCoadUUfBhOUyeQQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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