Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '529c224a5d3abebcca1826f2beaa7c1892cde835d1aa4a8ccf7c854a0bb61b38' 
  AND token = 'JUeQwpblT8HzY9wJsh8ThxDyCHzlIySJ21WNcsbJ55g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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