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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f97fefa5056a045a750b5a859b6bdc036783dc1cebc0e995059eea99f06e9f1' 
  AND token = 'K745lfhce95vEDOY32fRVVljHxiSIF6Em49kFUp4rg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}