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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0313e94a74f02955ef6e78eef349e7014bf3a5ba87442447fd933b98e532a86' 
  AND token = 'EZ9wM/m5802A7T9BY7ofqz8+UYQEu5WCPf0b+1DJObo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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