SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aae0118172cfc59a7b6744649892f517f89608dbc3f20374379d252998d398b' 
  AND token = 'vtBs/WP4DYy4SiwL8agKlCTGhAidIiqTA5q8REyYZzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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