Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd6cb70c737154883ce7f91a36ea257a8030534baedf92035eca74a3fe4643b3a' 
  AND token = '3JEqbniu6RD/VCgaQiEXlxZNKDA942N6WyxZgezNKfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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