Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb8a12021ebd3b1c7f3c765cba76387fa24b6ff0313bc81ce0446cb22da27671' 
  AND token = 'fZGBMXoAhRYd5jKR4iY2ez0LB1i59LZ39f9UiYF7cEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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