Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b89b3c08a0e4ec872614e44948bde69bb308ce4c41e42401d2155018ab218683' 
  AND token = 'dMDsZB82uP+ENir8tAy0JP81EAvQP80qF3yIcUlP7ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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