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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba3146718442a4367696a550df2c0c569bb138507df973b669cad27e2653c0c6' 
  AND token = 'SVRmDfggwfbJ5WdoERMGUVYRkW/X+c3Ch1WX0kgXQ+k=' 
  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"
    }
  }
}