SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6bf54d2b1560e7a4aa44e720c7918e7c53779cfc2c6d38de81b7bf4813c9133b' 
  AND token = 'nRjUZwSSojmzR+kzn2KYdJD25fLRE4TzihU2c0xgJDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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