Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7c3190318a9f08efb7e7b9a9b137311d05251a0ad676ded74a5bbf18da0fe9d' 
  AND token = 'acsH+kCLQN068JBrNoFr0ZGh5ekSrx7+paB0nutVMv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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