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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de95f9499df1c4d17ef4aa8dfd804d6638df10e7a3c16990b675063b49f8cd7f' 
  AND token = 'bvz4g+NupYK8fyhMpikdbnErOYV8iL4l8RHdTVomFKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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