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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '08d9314f85a5a4929478ddd80cce244fb093880a487ee3d93633be6db5cc1747' 
  AND token = 'TE4YvSaXasnPxDGp6bCCQkGvdY19mVE1rd2IZ+G0p6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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