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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02c235c7c77435620835de87949a7e1a70a26eac359493d2677d3613f0e7ff1d' 
  AND token = 'OjeTKZBZoAi9i3TcVqWR/3VL8/t6yrsoA/kVXl2ZYbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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