Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '998cab5a082e8ca6ec0a804870c3afc86da49a270164ece1f11de9c65125089f' 
  AND token = 'wu7bhZhm2GqeMuXJBefinGcX/qDXKl0J82OZgbJ2FAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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