SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80c7f62a8dae886f8c1853178860e15d9aaf9f58a0ec822af724f74c4b30f24d' 
  AND token = 'MMyvwTGO6/dr9eIW5R+JXPoYKwX2wxyqOBMVBVqXh8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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