Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ddbcbfb3db259096e5a6438332fab884de9e1cf73a00ad5d38d9bfa5d4a7c1' 
  AND token = 'JzXo2HNFWFaMbnaMmyDHi0N+xbP+1bOTcu+1IZrTwL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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