Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8f4b8278a1031d1f37f05b45b1bd2a6845f44403f2281fe4f29eb9070eef4da' 
  AND token = '5bY0A9tJVan6R1cVHCLDB8Y+hV1QBJVNDPJOQAtYfp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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