SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58c05bf115959d1f356479ea97b85a43db9768e3ae76caa12c01bbc8a1839289' 
  AND token = 'sAAPPPqlwKiAjynSqbOHTOXJ8bcbVjWgxeyxRKbHiPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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