Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c6c027a08c8f090e48dd5a99e8c7767fbd865732d0590cf02936e33a93f6b10b' 
  AND token = 'O45HvHKa98rsYb7lH6ekEFBjMEjozFDqlggRb9ey4hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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