Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54efd93de49a7c2cd0fbcb0bba7632eaf732cbad15bdc150c47ba7428b249cd6' 
  AND token = 'Hp5DGALbmFsXsk5y96IvMgJNg4QZe4fsy//trr+dMag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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