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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '064f8cba9ab91543d723de5a9dcd45b954b90fe8edd0caa7827f5cdbb104f8d3' 
  AND token = 'qtREQfg+AZwbjb/H87emFYb1WNVllruWpclQ2gTiqck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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