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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99e8549e511c7f8d5932cee70b2b959b65cc422fa6b63cf1a5dde105691ca4af' 
  AND token = 'YD30IVcbTQpqMg4U50hcVyn4hTIn4bUApZP9O9LYmas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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