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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a1a5b29badda9710da2b5fb2b0da8284cb9c87fc27b80b22ffb58bf7993eff7' 
  AND token = 'aHd82wneL4IL8RwuMq/e6P/seHx37Ew9ZNXbHDXMNGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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