SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00aa1ddffc41819cf73d74feffbb7ad63235cf5a97b489f92da9fc7b623d4007' 
  AND token = 'uuOm4TfaXGUSlphZGidPsIJYbtZlc5Tg1+6SmyYjBU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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