Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8beaf9502767dd0acda16f5ccd4c3395257f0076b9b89278806feef135c28ef' 
  AND token = 'S24wleXsdpYxePHYgk0xsPEd0YCtWdfd3p0Ke8l9gmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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