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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '658463a5ddd6d1ee5f4d338e362ea289bf0dfcd1144b09766b97d3f7d93b9fd0' 
  AND token = 'sRuZhl6sJltwB5CRrzbeVYy5vtc0Lu11YwzE74Z1YqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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