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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8153adb7d70aecaa6b6b89afc66f9778367bfe5cdb33b7c5ac308fa05cfe5fb7' 
  AND token = 'aRT1Wwo8HjP8wJB7PFfUtcZM0qxTx3jfuJICvIf/Ios=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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