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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c711022c9ef50cb6ae510b13793f6637d3c43e64c043b92a0dce54f2ed500165' 
  AND token = 'A0xGx7zMyg4Y1DZCyFdd/11SGllp1XscLEXgUTMuROw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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