Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f859fd19fe1642a95f11a81743ad619fd18d39be31495967b14fc3d7a267475' 
  AND token = 'cTC8aAysvel5VjSMxma5qNcEqyz9bPqol3DbT08Dnr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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