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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f80e060f4755bc0fb401db81d61b62f184bc85f1f5b93f39f24eb101637bf26e' 
  AND token = '7iSE9YAMgluVl5OlRxh/k6NRX2IB90t9jjf5dYn1pvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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