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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '53adc8aefaae1ccd1df861a76dea9bf058f2787505bea2e5ab193f4c716b8793' 
  AND token = 'Rf6xpXloaB/PNfWHlzD2o/U1cU4+j6Hpg6cwCQtRJ2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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