Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd77f3dbfe46713477156129f50c87d76addf66fcd348d2c12e460ca48e48ff9' 
  AND token = 'BtdgqWTzJF3WMh0a0xHmjmOE0YkP4/UeX0IX2ob3a2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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