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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4173b6ae7c79985ff63589d43859be47d3d09d257703179af64bf4ccffc03dc4' 
  AND token = 'Ult9qWcVs2wt+5h5YwAqHCFav1/kkERa+6YUK7+ayas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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