Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '620c34a65b255484dc5eb963e4288490bce1fa1ffe8470302ea869d100e22a94' 
  AND token = 'oIbLF48+C57OIMU6BMwE477eNan0a0CoTc/Rum33Z9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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