Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3efde2feefe02e3456cbe7032cb8c6b2de33873853cf58a788e791019bcdeb99' 
  AND token = '2q2HuG/qsoSnDGyQ/wPLfpKcNVGN5lRXGn7Gtm8TN8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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