Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '883b1b84e919aa8e16874dfbf884c96554cf9f3eead0a873732702583898c62e' 
  AND token = 'OFEom1vYJPB0UhS9nnpWCG3l4hvmNnLkzaUYOLF7hKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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