Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '689da13444e0c6484de2c19a3e285de98a5b467c25a1bb4f6e788e1b4f27bb93' 
  AND token = 'qYDag2rA2Qtpo5eMA8Km776z/1oAniEmxLbmQ3Rhe/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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