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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cf281947d38d2e22d672aaec0b782775dbd906fdaec5b876f27d36778242909' 
  AND token = 'qYZv8EpZWDcMMf0jq8dBxF/0S2ExXjzyaZoqo+LeCLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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