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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f489c309c565916b78ac254acc0fa4f75f4dd6dc98ffb8a264bb22679e4af5b9' 
  AND token = '4t4ygFwbUUTUwuIow4OUw4NMSoesRY7BPnAg+1ns3fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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