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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f74d3d8aabf0222ae78483aa1e5a4cceaf7c918fb8c5ef65cdc68b1edfd02c62' 
  AND token = 'G30NKG9nh8sP8gZfKaMDcs7w8aDev1n4FoSZxgDtmxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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