Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e10a546e6128a280e6b4fd2e26103fb9047a9b7139d9856634490aa5307c465a' 
  AND token = 'M+PvIKf3VHZPl45ZayVamo65Ksw32p9SCSWit9OpC3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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