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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e8c26bd39ae6ef7d7e11f93781ff169ac249f619a3f53578d1cd3809e57a55a' 
  AND token = 'uhdaSgLt7/KIs4UwZX01N/y3Wl0hQKboLnReSJOCodo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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