Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c7eea8d14d73ee5e91fa0d18a1d0cd026e051bbc2136ff394ef706a3e917714' 
  AND token = '1xR98bLN8EvmctD+vDT3E3p2Rgrn2ktj3JGoIdhuodM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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