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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '580f388b8611e48667d04010b4864cbe456d21845360c1fe96594fd3210f422d' 
  AND token = '1EdKFvksLeMA2idJHJMAtBuT3sIK+BvrK/p4rRyR6hU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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