Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97f19b8333775f43a0f23a2f0c0812a2983e81344ada700030d3792108a54f24' 
  AND token = 'd1v1MTJ2nE9JHwkraJHEEWuz9/A8alJgr4NN/MtuE9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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