Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55a3f6c21dfb874927ee3ef387a592aeeea82866a00699098b6eceb91e8766e5' 
  AND token = 'YIFo3+94jn08pIzU+Vwb04THzjgx2vbJnfAaP5riE/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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