SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c0d77c5ff5d1e3d244d04a44fcf99632e337f031ccbe7be6dd58ea139ade0d56' 
  AND token = 'CqFhO/9UkGd7bvxh38grb+JWKjMQan9c3LZmAARz/hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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