Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3f2943b19236c28066cc85a2f30448c913b431998c16437c06f56ee337e1a8e1' 
  AND token = 'Fa4lOid8TTqoroWacY4qjAFAw5zeitOhU7LIsOrS1yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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