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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0073132b15a3c1cac27d8d30eec25d0a578487d61b4338a2cd0c825a80b9551c' 
  AND token = '9b0NqJXwynuFXowOVzW9TjscRxT5J0Ltu8L5tOCPaMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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