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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cd8f3f896c3c6c265fb7b8e959d237896e078df2c13ba63a9476cfa9a851985' 
  AND token = 'vpWAeYrKkAtGs2eOPEBoPiHZ8+R005cS1gUfvpermCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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