Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd26749063b3da6b31d3d4e5f5de7f3df22732dfd2c563032d844efce60fd17ee' 
  AND token = 'E+t2Fx2JxcDIZZhFGa0784jXDHnt3+dF6ncFmExOBFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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