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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1958c9ebb696cf0195751cf0acb4bc7f6fc6f3d5efb0d165350f66d65965ed46' 
  AND token = 'N7XtqQI2wsqYXn/xWb8Cued0aLmHzK6A2usn2OBDUZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}