Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7ad5d6db44ef87a020eabf6f15d1d5f60c2820213f8d3f9432621a789fd6080' 
  AND token = 'gyjqzfeB3YPyB92px4br88ogbLr4But00GsnwOC9aOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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