Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ad9790e8f4eb283bb962918dc39603f0c2330af237a8221d4e7427195c2bb1' 
  AND token = 'EblR0UVLbTDDUungtkicNjldQSiMsiT9vnUKp3hEi0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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