Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '967c62c9feef4f8bb8b4bd3344784d8fd2f0fb0338ed8b1a481c65dd941fb3b2' 
  AND token = 'S2paIblW+BCkL15jBii35GVk5kEfp+qgaVw/nb4mfDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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