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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6bf50066f930c55c6977cfa120fb037a9b3e70c49fc147ace7dc72aa45cab6c' 
  AND token = 'Er37nZ8lfqCO/4Uf0hNBdZkue+wzjQHUYJREmD1IupU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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