Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a4163bc6148d0901ba43eb882e8dd408deadd216646426e24d384200b851bd1' 
  AND token = 'tmyHYvULYCEd31uSOWzPjvKGtagx3jylTczTPspoPUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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