Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b230d03728fea013018c8131780ae55db0372360d76ad69071d9a2d85cae704a' 
  AND token = 'KsWOOSHP9rF4tpbFrB+WoTKAb9wxuT/VA60AqMcRDHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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