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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ecaf8930bb4ef9b14cdb5a5f9d3a6cca8f51592e62e8858795c665cd590e4ccb' 
  AND token = 'WKsH6MsltckefwPTYjpeS/YOxKVhyAnveY94QiENZuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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