Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '617515f6e1b3d38e26c2e8e29a1bcabe003883e5dd84812bc2c354892622b084' 
  AND token = 'dHrwUtmVSLJLOcYfKllnIeHABH5YHDk4jylWyWIayOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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