Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71d716fe4792f25fa1f7918c04bfa701d5667a18e096cb307a1424eb1fcaa0b4' 
  AND token = 'tFRsIncfs66kuRFBpcBwj9Z/JH34KTBl8X0KA/N07Lc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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