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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8957bf2a75d2b39ff7c96c903df00eef537352d3c6ca0319df874b622a686c7b' 
  AND token = 'J7VNL+7XpW3uitQa6CJ5a/bBHs2eL59lIv05+UspMJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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