Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '882c248abc921b970abb98478e8e4fff42bc69e2930ef057509ef0143fa31eaf' 
  AND token = 'ifrPjk6EIH6jOERGPqbx2MieZqnwPmgMny+xRMB8CC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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