Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b426c4ba04c4951f321d02934fa23cb7f95497a693a2cbe345e9175cb788f2e' 
  AND token = 'V0uv1nkkEQ7p8n0B9Q84Qwxe8XS78zEGbdFIaAvhS2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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