Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1f72b77247cc8923d8114f3fd963849af13870c2ec3cebafd7eabe93736268' 
  AND token = 'P2JhddYatLWEN7e7XOg/8GzqNjbXJ2WbSUBr9lP2988=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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