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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '750b69f17a26436d649c9a8e23b7a294d8268243b62a89aafc2ba63d8dcd7564' 
  AND token = 'eNe6RPYvkl/saPzY0QE6cOhOdL8YYBnIDJSxVonS8BI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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