Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c1036c1e92ffd3486071cb283fe926bb40213ebdbf7e1a0a159cee1c0244a22' 
  AND token = 'ildVB7Deq2sMUT57BOxPcpfWAOYwqbLbHvn330PTcuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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