Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1951f18ed3b9f078e0f7ecafa69ddf5543faec19281b5e4db92b32f20ee5830' 
  AND token = '/L4IsRugfFEur7+CR1EY/nCkAdtbd4cGssej2YFMJzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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