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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e530a62be46bb23d59a8cae5a5232522f0f11a473c2ce365a39e9509ad21aa2a' 
  AND token = '9SjTYf0HWqWhUF06TF5CLy+R52xSorQ//7/wqx12onY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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