Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc8e261fb92fea301cd17d30282a74e5f500e50b3215f293358edf0cd5d1b4c5' 
  AND token = 'A7W/X/MJ6jgaOlnI04SNKaJAVahh2bD+o5drdR+B71Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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