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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '413d135f74a8e1c3850685f041e9ad6e90d4718b6b74c977b455406e138f08dc' 
  AND token = '61LvxcGx7rjqcg9oGKgkolmLG8iqIcb9LRjTGqiFHME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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