Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70428213aa5cc8471d16055427531cff476f60fe6d5f2e7b513aa6125e542af3' 
  AND token = 'GKx2H0vblQSGiQlcIcZQEQIbMWimLY1NRphxi7Zf0xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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