Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f819664b62cb0f09331a510a06c75e45deb3cf39cd88a567806ba480db32948e' 
  AND token = 'xD3BxgJK4IA69PtMGwb+F2aNJS+itV0kOnxNSnKl8lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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