SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23c94294ea3f6f957329c9b862490d62ea20c22527c38466f5073f54901be4a1' 
  AND token = 'km4ndLghtSyWqgMKl0uh7tX7Gm+DKvNCkXj2VfjvW+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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