Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb54755cc55c2b36db1baaa4f402c8bcebc7718c406889ebc5ad42ac1b39b32f' 
  AND token = 'A7VDtS/Pbs1vb71cPn+FTEEJ2hYjInVsnB0KoennqUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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