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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f80b73ad018c9a5ca57a207e95bbfb88832b5ea5507b86a5e5f36b72780bebdc' 
  AND token = 'FW+Pwl4c2dXHkWWZMAtBlV2V1SkpezPevfARgWn3LzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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