Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8ce6c4674b6f3e0f97ba46a2464a71bb8c33f85aba6df39b3648ce5ff192f38' 
  AND token = 'qfuVt7jbRhOUE28zSdEEsE0kQANwqzm7YgqIzLVuVjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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