Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee1de0eb61c587ac675c865a95da7761d1f94d69d0fcf295e05de1f71d6f33cb' 
  AND token = 'E1y+2dbIrI1DbqwPxPU6VDE/1vTmHsVpSZMMKmlBcCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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