Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '574d69371516a92f4d46c81703f5adfa3ac943ab772acc61794f419649683b2a' 
  AND token = 'bxaAixyp0QgHHeOnPJUCUT3Dlj8/6oMHLlh10ZzbqfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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