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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b8deace69b32b540a0862c3a645475967c0a81907a8d3a980e1ea31d690188a' 
  AND token = '0C5W6+xbOzSaqdtm18hS82rYCrL3v40pi2gd8j2bYYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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