Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9132e9d312e29032ba4cb8434d5b6e77bc3b9f93daf3ef886753301c8236ae1' 
  AND token = 'Ml10nhXER52k6F/BRWkt3h8rlVPfro2/F/NHxRuYfLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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